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nds32: fix up stack guard gap

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commit c453db6cd9 upstream.

Commit 1be7107fbe ("mm: larger stack guard gap, between vmas") fixed
up all architectures to deal with the stack guard gap.  But when nds32
was added to the tree, it forgot to do the same thing.

Resolve this by properly fixing up the nsd32's version of
arch_get_unmapped_area()

Cc: Nick Hu <nickhu@andestech.com>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Qiang Liu <cyruscyliu@gmail.com>
Cc: stable <stable@vger.kernel.org>
Reported-by: iLifetruth <yixiaonn@gmail.com>
Acked-by: Hugh Dickins <hughd@google.com>
Link: https://lore.kernel.org/r/20210629104024.2293615-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2021-06-29 12:40:24 +02:00
parent 7544d21b40
commit 9d06d3d2a1
1 changed files with 1 additions and 1 deletions
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2
arch/nds32/mm/mmap.c
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@ -59,7 +59,7 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr,
vma = find_vma(mm, addr); vma = find_vma(mm, addr);
if (TASK_SIZE - len >= addr && if (TASK_SIZE - len >= addr &&
(!vma || addr + len <= vma->vm_start)) (!vma || addr + len <= vm_start_gap(vma)))
return addr; return addr;
} }